Laser implosion diagnosis system

Abstract

The invention discloses a laser implosion diagnosis system. The laser implosion diagnosis system comprises a filter disc, a dual-channel X-ray imaging system and a dual-channel X-ray streak camera. The dual-channel X-ray streak camera comprises a dual-channel X-ray scanning image conversion tube, an optical fiber, an image intensifier and an image recording system. The dual-channel X-ray scanningimage conversion tube comprises multiple groups of electronic focusing systems and scanning deflection electrodes, and can detect double scanning speeds of X-rays. The whole process of pellet compression in a laser implosion physical experiment is measured by a low-scanning-speed channel, and the pellet focused center implosion process is measured by a high-scanning-speed channel. The laser implosion diagnosis system is compact in structure and large in dynamic range, can measure the whole process of pellet compression in the laser implosion physical experiment and can also conduct high time resolution measurement on the pellet focused center implosion process which needs to be studied carefully, and has broad application prospects in the laser inertial confinement fusion implosion physicexperiment study.

Description

technical field [0001] The invention belongs to the field of laser fusion research and the field of X-ray detection, in particular to a laser implosion diagnosis system. Background technique [0002] In the physical experiment research of laser inertial confinement fusion implosion, the precise detection of the compression process of the target capsule is a very important research content. Through the diagnosis of the capsule compression process, key physical information such as the implosion speed, the remaining mass of the shell, and the moment of implosion centering can be obtained. However, with the development of laser fusion research, long-pulse lasers of tens of nanoseconds will be used to drive and compress the target capsule, while the time course of the core implosion of the target capsule is only a few hundred picoseconds. In order to further understand the physical process of the laser-driven implosion of the target capsule, it is necessary to obtain both the fu...

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Problems solved by technology

However, this diagnostic system can only select a single scan speed to measure the signal to be tested.

In order to observe the change process of the target capsule in the whole time, we can only select the slow-sweep speed gear with a long time window. At this time, the time resolution of the system is hundreds of picoseconds, and it will not be possible to perform high-time-resolution measurement of the core implosion process of the target capsule. ; and in order to carry out the high time resolution measurement to the core implosion process of the target pellet, only the fast sweep gear with high time resolution can be selected, and the measurement time window at this time will only have hundreds of picoseconds to several nanoseconds, and it is impossible to obtain The whole process of target ball change

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